Students should be directed to manipulate this simulation prior to class. Students will be investigating how different salts differ in their solubility in water. The teacher should direct students to ignore the Ksp portion of the simulation, as students will be covering this in grade 12 chemistry.
Again, there is a teacher guide below the simulation for teachers to further explore the simulation.
Activity: Ion Charge & Size on Solubility
The class could be started by the teacher posing the following 2 questions:
1. How does ion charge affect solubility?
2. How does ion size affect solubility?
Students (in groups of 3 or 4) should be given time to once again manipulate the simulation in class (access to computers or tablets is needed) to answer the 2 questions above. Students should then be asked to give an explanation as to why this is the case (see document below for explanation).
If desired, students could study how ionic substances dissolve in water in the lab, instead of using the above simulation (depending on time and resources).
Students should be reminded of solubility table they used in unit 2 when studying reactions. I've included the document below which you may want to re-distribute to students. Students should be reminded that these are general guidelines to predicting the solubility of salts.
Students should be put into small groups of 3 or 4 and given several question to solve - see following document. Students will be working with each other to determine how to write these equations. They will then each be responsible for posting one of the answers around the room so that students can check their own work.
Curriculum Expectations: 2.1 Use appropriate terminology related to aqueous solutions and solubility 2.5 Write balanced net ionic equations to represent precipitation and neutralization reactions 3.4 Identify, using a solubility table, the formation of precipitates inaqueous solutions
http://phet.colorado.edu/en/simulation/soluble-salts
Students should be directed to manipulate this simulation prior to class. Students will be investigating how different salts differ in their solubility in water. The teacher should direct students to ignore the Ksp portion of the simulation, as students will be covering this in grade 12 chemistry.
Again, there is a teacher guide below the simulation for teachers to further explore the simulation.
Activity: Ion Charge & Size on Solubility
The class could be started by the teacher posing the following 2 questions:
1. How does ion charge affect solubility?
2. How does ion size affect solubility?
Students (in groups of 3 or 4) should be given time to once again manipulate the simulation in class (access to computers or tablets is needed) to answer the 2 questions above. Students should then be asked to give an explanation as to why this is the case (see document below for explanation).
If desired, students could study how ionic substances dissolve in water in the lab, instead of using the above simulation (depending on time and resources).
Factors that Affect Solubility of Ionic Substances
Students should be reminded of solubility table they used in unit 2 when studying reactions. I've included the document below which you may want to re-distribute to students. Students should be reminded that these are general guidelines to predicting the solubility of salts.
Solubility Table
Activity: Total & Net Ionic Equations
Students should be given a copy of the handout below which tells them what a net ionic equation is and the rules to writing them.
Representing Ionic Reactions with Net Ionic Equations
Students should be put into small groups of 3 or 4 and given several question to solve - see following document. Students will be working with each other to determine how to write these equations. They will then each be responsible for posting one of the answers around the room so that students can check their own work.
Net Ionic Equations Practice
*Handout above courtesy of:
http://depts.gpc.edu/~gpcltc/handouts/science/Practice_Problems_on_Net_Ionic_Equations.pdf
Curriculum Expectations:
2.1 Use appropriate terminology related to aqueous solutions and solubility
2.5 Write balanced net ionic equations to represent precipitation and neutralization reactions
3.4 Identify, using a solubility table, the formation of precipitates inaqueous solutions